title: Usefulness of cone-beam CT before and after percutaneous vertebroplasty.
abstract: OBJECTIVE
  The usefulness of cone-beam C-arm CT for percutaneous vertebroplasty has not been fully evaluated. The purpose of this study was to assess the feasibility of cone-beam CT for evaluation before and after vertebroplasty.
  
  
  METHODS
  This prospective study included 22 consecutive patients (15 women and seven men) with osteoporotic compression fractures (51 vertebrae). Cone-beam CT and 64-MDCT were performed before and after percutaneous vertebroplasty. Multiplanar reformations of the axial, sagittal, and coronal planes were obtained. We evaluated the presence of cortical defects, vacuum phenomena in adjacent disks, and cement leakage, and we calculated the sensitivity, specificity, positive predictive value, negative predictive value, and accuracy of cone-beam CT compared with MDCT.
  
  
  RESULTS
  All 75 cortical defects in 51 vertebrae seen on MDCT were also observed on cone-beam CT (100% sensitivity and specificity). Vacuum phenomena were detected in 33 of 86 (38.4%) adjacent disk spaces on MDCT and in 29 on cone-beam CT (84.8% sensitivity, 98.1% specificity, and 93.0% accuracy). Cement leakage was noted at 17 disk spaces, 15 paravertebral soft tissues, and 12 veins on MDCT. All cement leakages were correctly identified on cone-beam CT.
  
  
  CONCLUSIONS
  Cone-beam CT is able to correctly evaluate for vertebral fractures and vacuum phenomena in adjacent disks before vertebroplasty and for cement leakage after vertebroplasty.
authors.affiliation: Department of Clinical Radiology, Graduate School of Medical Sciences, Kyushu University, 3-1-1 Maidashi, Higashi-ku, Fukuoka 812-8582, Japan.
authors.forename: Akio
authors.initials: A
authors.lastname: Hiwatashi
authors.forename: Takashi
authors.initials: T
authors.lastname: Yoshiura
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Noguchi
authors.forename: Osamu
authors.initials: O
authors.lastname: Togao
authors.forename: Koji
authors.initials: K
authors.lastname: Yamashita
authors.forename: Hironori
authors.initials: H
authors.lastname: Kamano
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Honda
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D050815:Fractures, Compression / Q000000981:diagnostic imaging* / Q000601:surgery*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011300:Preoperative Care / Q000379:methods; D011379:Prognosis; D016103:Spinal Fractures / Q000000981:diagnostic imaging* / Q000601:surgery*; D013904:Thoracic Vertebrae / Q000000981:diagnostic imaging / Q000293:injuries* / Q000601:surgery; D036542:Tomography, Spiral Computed / Q000379:methods*; D054854:Vertebroplasty / Q000379:methods*